CN1213006A

CN1213006A - Mineral powder and coke powder cold-press agglomeration and agglomeration method

Info

Publication number: CN1213006A
Application number: CN 97118905
Authority: CN
Inventors: 任义; 张启轩
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-09-26
Filing date: 1997-09-26
Publication date: 1999-04-07

Abstract

A cold pressing process for making blocks of ore powder and coke powder features that ore powder (70-85 portions), coke powder (10-15), cement (5-10) and a little water are uniformly mixed and then cold pressed under pressure higher than 25 MPa to form the cubic or rectangular blocks (120-240) X (60-120) X (25-60) mm. Its advantages include saving raw materials and energy, improving furnace condition, high block-forming rate, low cost and less environmental pollution.

Description

Breeze, coke powder cold-press agglomeration and agglomeration method

The present invention relates to a kind of breeze, coke powder cold-press agglomeration and agglomeration method, specifically is manganese, the chromium of the smelting ore of reductive agent, the agglomeration and the agglomeration method of powdered iron ore with carbon.

Along with developing rapidly of Iron And Steel Industry, iron alloy production also is surging forward, carbon wherein is that manganese, chromium, the iron ore of reductive agent is the big series that iron alloy is produced, account for 90% of iron alloy output, but because problems such as mineral resources and quality have been brought very big difficulty to production, chrome ore for example, china natural resources is less, and all in outlying areas such as Xinjiang and Tibet, transportation is produced all inconvenient, and is therefore most of by import, on the other hand because the lump ore of chrome ore is few, have 3rd/4th approximately, fine ore, and also utilization ratio is low.And manganese ore, though reserves are big, but grade is low, still need the import manganese ore, breeze also accounts for more than 50%, breeze is gone into the ventilative life that stove will influence furnace charge, and cause " material collapses " and " turning over slag ", the working of a furnace is worsened, the equipment scaling loss, cause output to descend, the power consumption height, the cost height, simultaneously also cause a large amount of breezes from flue dust, to enter atmosphere, pollute the waste of environment and resource, one ton of iron alloy of every according to statistics production produces the dust quantity of 120kg approximately, wherein 80% is mine dust, account for into 2.4% of stove ore deposit amount, 15% coke powder is arranged, account for into 2% of oven coke, therefore the harm of breeze, running off all is serious problems, breeze is gone into stove, causes flue dust to carry breeze secretly, and the breeze that flue dust is taken away all causes the wasting of resources and environmental pollution, the output of same coke powder is because the coke price height, burnt source anxiety, the coke of buying will sieve, and therefore causes a large amount of coke powders to overstock and stacks, can not utilize, manganese chromium two is that alloy production uses the ore deposit more than 4,000,000 tons every year according to statistics, and breeze accounts for more than 50%, and the coke consumption is more than 1,000,000 tons, coke powder accounts for more than 30%, add the mineral powder loss of others, annual cause the loss of several hundred million Renminbi, for this reason to country, the utilization of breeze coke powder is a very important problem, at present utilize the countries in the world, aspect all actively making great efforts to carry out a large amount of research and application work for breeze, breeze utilizes the aspect that the briquetting method is arranged at present, the pelletizing method, agglomerates of sintered pellets method etc., wherein the briquetting method is that breeze is carried out levigate drying clamp dog, adopt molasses and lime to make binding agent or with briquetting after drying such as lime or starch, the pelletizing method is to use the nodulizer balling-up behind the breeze ball milling.Give hot reducing method, be crushed to-200 orders, wilkinite is made binding agent, in fine ore, add carbon and give reduction, pelletizing gives heat back sieve through 120-250 ℃ and removes the following fine ore of 10mm, then through rotary kiln baking, to composition of ores and coal-fired strict, operational difficulty, also has a kind of preheating reducting pellet method: be to reduce at the rotating bed reduction furnace, cause at balling disk (-sc), again ball is constantly fed the rotating bed reduction, through high temperature reduction, can discharging after one week through high-temp combustion, so the cycle is long, the temperature height, and qualification rate is low; The agglomerates of sintered pellets method adopts wet grinding, through dehydration, adds binding agent, 1300 ℃ of sintering balling-up, this method complex process equally, yield rate is low, the high serial problem of power consumption, the shortcoming of above-mentioned maximum is that technical process is long, and facility investment is big, and equipment is more than at least ten million yuan.

Purpose of the present invention provides a kind of with breeze and coke powder mixing cold-press agglomeration and agglomeration method for the shortcoming that overcomes above-mentioned prior art with deficiency just,

The object of the present invention is achieved like this:

A kind of breeze, coke powder cold-press agglomeration is characterized in that it is to be formed through colding pressing by following weight parts proportioning raw material:

Breeze 75-85 part coke powder 10-15 part cement 5-10 part.

Preferred weight part proportioning of agglomeration raw material of the present invention is:

Breeze 80-85 part coke powder 10-12 part cement 5-8 part.

Optimum weight part proportioning of agglomeration raw material of the present invention is:

8 parts of 12 parts of cement of 80 parts of coke powders of breeze.

Wherein agglomeration specification is long * wide * high (mm)=120-240 * 60-120 * 25-60 square or rectangular parallelepiped; Breeze is manganese, chromium, powdered iron ore, and particle diameter is-particle or the powdery of 10mm, wherein-to be greater than 50% coke powder be metallurgical coke, coal gas coke powder to 5mm, particle diameter≤5mm cement is 325,425 trades mark.

The agglomeration method of agglomeration of the present invention, it is characterized in that 75-85 part breeze, 10-15 part coke powder and 5-10 part cement, it is even to add mixes with small amount of water, send into powerful press and be cold-pressed into piece, control pressure is greater than 25MPa, then piling, spontaneous curing 24 hours, stack more than 10 days the agglomeration finished product.

Raw material manganese of the present invention, chromium, powdered iron ore are to be the breeze of the ore of reductive agent electrosmelting with carbon, it mixes with coke powder and is cold-pressed into piece, directly be pressed in the agglomeration reductive agent, also can play the reductive agent effect, save a large amount of lump cokes, again coke powder be utilized fully again, and cement has been the binding agent effect, it has rapid solidified characteristics simultaneously, increases product strength, hardness.

Owing to take technique scheme, make the present invention compared with the prior art have following advantage and effect:

A) the raw materials used reworking that do not need can directly be allocated into and be cold-pressed into piece, and the agglomeration component is simple, does not have the harm composition;

B) can allocate use into lump ore, reduce and gone into the stove powder, reduce smoke discharge amount, improve environmental pollution, make full use of resource, save lump ore, lump coke;

C) stove is gone in the breeze agglomeration, improve the working of a furnace, CO gas is evenly overflowed during the good permeability reduction, and flame is even, and is easy to operate;

D) production process does not have any three wastes discharge, improves Working environment and reduces labour intensity;

E) can improve output more than 2%, power consumption descends below 1%, applicable to the electrosmelting ore breeze agglomeration that with carbon is reductive agent;

F) investment is little, and equipment is simple, and cost is low, instant effect.

Embodiment 1:

With 75kg manganese ore powder, particle diameter-10mm, wherein-5mm accounts for 50% raw material, adds the coke powder particle diameter-5mm of 15kg metallurgical coke, cement 10kg 325 trades mark and less water stir, send into powerful press cold-press agglomeration, control pressure 30MPa, the rectangular parallelepiped of agglomeration specification length * wide * high=120 * 240 * 50 (mm), piling then, spontaneous curing 24 hours was stacked 10 days, can use.

Embodiment 2:

With the 80kg chromite ore fine, particle diameter-8mm, wherein-5mm accounts for 60% raw material, adds 12kg coal gas coke powder, coke particle diameter-4mm, cement 8kg 325 trades mark and less water stir, send into powerful press cold-press agglomeration, control pressure 25MPa, the square of agglomeration specification length * wide * high by 120 * 120 * 25 (mm), piling then, spontaneous curing 24 hours was stacked 14 days, can use.

Embodiment 3:

With the 85kg powdered iron ore, particle diameter-10mm, wherein-5mm accounts for 55% raw material, coke powder particle diameter-the 5mm that adds the 10kg metallurgical coke, cement 5kg 425 trades mark are by 1.2 embodiment cold-press agglomerations, the rectangular parallelepiped of specification length * wide * height=240 * 115 * 53mm, piling then, spontaneous curing 24 hours was stacked 10 days, can use.

Claims

1, a kind of breeze, coke powder cold-press agglomeration is characterized in that it is to be formed through colding pressing by following weight parts proportioning raw material:

Breeze 75-85 part coke powder 10-15 part cement 5-10 part.

2, agglomeration according to claim 1 is characterized in that wherein the weight part proportioning of each raw material is:

Breeze 80-85 part coke powder 10-12 part cement 5-8 part.

3, agglomeration according to claim 1 is characterized in that wherein the weight part proportioning of each raw material is:

8 parts of 12 parts of cement of 80 parts of coke powders of breeze.

4,, it is characterized in that the agglomeration specification is long * wide * high (mm)=120-240 * 60-120 * 25-60 square or rectangular parallelepiped according to claim 1,2 or 3 described agglomeration.

5, according to claim 1,2,3,4 described agglomeration; it is characterized in that breeze is manganese, chromium, powdered iron ore; particle diameter is-particle or the powdery of 10mm, wherein-and to be greater than 50% coke powder be metallurgical coke, coal gas coke powder to 5mm, particle diameter≤5mm cement is 325,425 trades mark.

6, as the agglomeration method of agglomeration as described in the claim 5, it is characterized in that 75-85 part breeze, 10-15 part coke powder and 5-10 part cement, it is even to add mixes with small amount of water, send into powerful press and be cold-pressed into piece, control pressure is greater than 25MPa, then piling, spontaneous curing 24 hours, stack more than 10 days the agglomeration finished product.